Birds around a tree

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Birds around a tree

This video, recorded in an urban environment during snowy weather, shows a bird colony flying around a tree.

The first difficulty in the analysis comes from the handling of the background complexity. The second difficulty is induced by the growing number of birds, up to 200 individuals, and their complex dynamics (size and velocity variations).

The TRACK’s tools, more specifically the background subtraction and the predictive tracking method permit to isolate and study the group as well as individual motion.